Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA192,977A
Inventor
Kanshi Kawahara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KAWAHARA SEISAKUSHO CO
Mitsui Kinzoku Co Ltd
Original Assignee
KAWAHARA SEISAKUSHO CO
Mitsui Mining and Smelting Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KAWAHARA SEISAKUSHO CO, Mitsui Mining and Smelting Co LtdfiledCriticalKAWAHARA SEISAKUSHO CO
Priority to CA192,977ApriorityCriticalpatent/CA992575A/en
Application grantedgrantedCritical
Publication of CA992575ApublicationCriticalpatent/CA992575A/en